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Stability measurements on a 1-T high temperature superconducting magnet

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6 Author(s)
J. W. Lue ; Oak Ridge Nat. Lab., TN, USA ; L. Dresner ; S. W. Schwenterly ; D. Aized
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A high temperature superconducting magnet based on Bi-2223 conductor was built at the American Superconductor Corporation. The magnet was constructed by a react and wind technique using conductors made from a metallic precursor process. It has a winding ID of 25.4 mm, OD of 87.6 mm, and height of 107.3 mm. A heater, two thermometers, and several voltage taps were built into the high field region of the magnet for stability measurements. The magnet generates 1.1 T central field at 4.2 K when operating at 1 /spl mu/V/cm over the entire conductor length, including all the joints. Stability measurements were performed in background fields up to 2.5 T from 4.2 K to 77 K. Stability margins more than 2 orders of magnitude higher than a low temperature superconductor were observed.<>

Published in:

IEEE Transactions on Applied Superconductivity  (Volume:5 ,  Issue: 2 )